build failure due to old libxcb (1.8.1-2+deb7u1 debian wheezy)

[kevmitch]

On git master (32e666c354e4a3160d8cf1d303cb51990b095c87)

$./configure
<attached>
$ make

CC libavdevice/alldevices.o
CC libavdevice/alsa-audio-common.o
CC libavdevice/alsa-audio-dec.o
CC libavdevice/alsa-audio-enc.o
CC libavdevice/avdevice.o
CC libavdevice/dv1394.o
CC libavdevice/fbdev_common.o
CC libavdevice/fbdev_dec.o
CC libavdevice/fbdev_enc.o
CC libavdevice/jack_audio.o
CC libavdevice/lavfi.o
CC libavdevice/oss_audio.o
CC libavdevice/oss_audio_dec.o
CC libavdevice/oss_audio_enc.o
CC libavdevice/timefilter.o
CC libavdevice/v4l2-common.o
CC libavdevice/v4l2.o
CC libavdevice/v4l2enc.o
CC libavdevice/xcbgrab.o
libavdevice/xcbgrab.c:50:5: error: unknown type name ‘xcb_shm_seg_t’
libavdevice/xcbgrab.c: In function ‘setup_window’:
libavdevice/xcbgrab.c:581:5: error: implicit declaration of function ‘xcb_shape_rectangles’ [-Werror=implicit-function-declaration]
libavdevice/xcbgrab.c:581:35: error: ‘XCB_SHAPE_SO_SUBTRACT’ undeclared (first use in this function)
libavdevice/xcbgrab.c:581:35: note: each undeclared identifier is reported only once for each function it appears in
libavdevice/xcbgrab.c:582:26: error: ‘XCB_SHAPE_SK_BOUNDING’ undeclared (first use in this function)
cc1: some warnings being treated as errors
make: * [libavdevice/xcbgrab.o] Error 1

Build works fine with libxcb=1.10-3 on Debian unstable/testing

[kevmitch]

configure output with libxcb1-dev=1.8.1-2+deb7u1

[Carl Eugen Hoyos]

Could you provide the output of the following command?

$ grep XCB config.h

[kevmitch]

$ grep XCB config.h
#define CONFIG_LIBXCB 1
#define CONFIG_LIBXCB_SHM 0
#define CONFIG_LIBXCB_XFIXES 0
#define CONFIG_X11GRAB_XCB_INDEV 1

[Carl Eugen Hoyos]

Does attached patch change anything in the output of make libavdevice/xcbgrab.o?

[kevmitch]

Yes, that seems to fix it

$ make libavdevice/xcbgrab.o
CC      libavdevice/xcbgrab.o
libavdevice/xcbgrab.c: In function ‘setup_window’:
libavdevice/xcbgrab.c:583:5: warning: "XCB_SHAPE_RECTANGLES" is not defined [-Wundef]
libavdevice/xcbgrab.c:567:21: warning: unused variable ‘rect’ [-Wunused-variable]

[Carl Eugen Hoyos]

I believe the fix is not yet complete but could you test the following with my first patch applied?

$ ffmpeg -f x11grab -i :0 -t 10 -qscale 2 -y out.mov

Is out.mov created and is it playable?

Could you provide the output of the following command?

$ ls -l /usr/include/xcb

[kevmitch]

yes, the mov is playable. It does however only cover the top left 640x480 pixels. Not sure if it was supposed to grab my whole screen or not.

$ ls -l /usr/include/xcb
total 936
-rw-r--r-- 1 root root 461305 May 15  2013 xproto.h
-rw-r--r-- 1 root root  12293 May 15  2013 xc_misc.h
-rw-r--r-- 1 root root  17847 May 15  2013 xcb.h
-rw-r--r-- 1 root root   3887 May 15  2013 xcbext.h
-rw-r--r-- 1 root root 447460 May 15  2013 glx.h
-rw-r--r-- 1 root root   3674 May 15  2013 bigreq.h

[Carl Eugen Hoyos]

I committed my patch above as 792f0f20456cc24f1f1b9ee445e50737d65e38df and 8c0ae9015a2bd8b3f4f92c35570e592e7fdeaef0
The fix should be improved but since this is a build failure I pushed the small change.
Thank you for the report and thank you for testing!

[Carl Eugen Hoyos]

Replying to kevmitch:

yes, the mov is playable. It does however only cover the top left 640x480 pixels. Not sure if it was supposed to grab my whole screen or not.

vga is the default for -video_size / -s for x11grab, I believe this is documented.